For annealing and hardening of larger parts, for example heavy cast parts or tool steel dies to temperatures between 800 °C and 1100 °C, we recommend our bogie hearth furnaces with radiation heating. The bogie can be loaded outside the furnace. When the design includes an electro-hydraulic lift door and a motorized bogie, the furnace can be opened while hot and the load can be removed for cooling or quenching. When several bogies are used together with a second door or bogie transfer system, one bogie can be loaded outside the furnace while the other bogie is in the furnace. This shortens process times and the residual energy of the furnace can be used when the new charge is heated.

Gas-fired bogie hearth furnaces distinguish by their unique efficiency. The use of high-speed burners allows for short heating times. The burners are arranged according to the furnace geometry providing for a optimum temperature uniformity. Depending on the furnace dimensions, the burners can alternatively be equipped with recuperator technology to save energy. The high-quality, long-life fiber insulation with storage capacity provides for short heating and cooling times.

Tmax up to 1400 °C, depending on furnace design

Powerful, sturdy high-speed burner with pulse control and special flame control in the furnace chamber provide for optimum temperature uniformity

Operation with city gas, natural gas or liquified gas

Fully automatic PLC control of the temperature as well as monitoring of the burner function

Reduction-resistant fiber insulation with low heat storage provides for short heating and cooling times

Dual shell housing provides for low outside temperatures

Exhaust hood with fittings for further discharge of the exhaust gases

Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Defined application within the constraints of the operating instructions

Additional equipment

Automatic lambda control to set the furnace atmosphere

Exhaust air and exhaust gas piping

Recuperator burners utilizing part of the waste heat in the exhaust tract to preheat the combustion air and considerably contribute to energy saving

Thermal exhaust cleaning systems

Process control and documentation via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation and control